Liked him best in a whole lot of movies. :-)
Today, I liked him best in Rounders with Henry Fonda. Loved that mean and nasty crazy horse, too.
Liked "The Courtship of Eddie's Father" - although I guess that was really Ronnie Howard's movie.
"The Rounders" and "Pocketful of Miracles" were good too.
Another western where he was a good bad guy. Van Heflin was hired to take him to jail by train. Can't think of the name of it, but he turned out to be pretty OK by the time it was over.
Just an all around believable guy in a variety of roles. Very good with horses - grew up around them.